Onepiece| Future Allies of Strawhats

As we are heading much more into the yonko saga we are getting introduced much more powerful characters. We have already got a view of some yonko and their commander's, They are extremely powerful and are nothing like what strawhats have fought before. We can already guess that strawhats themselves will not be able to defeat pirates in the new world specially yonko as they have already messed up with 3 out of 4 yonkos. As Shanks is the 4th yonko, we can easily say that there wont be fight between the Strawhat Pirates and Redhair Pirates. Luffy has already started fight with Bigmom and is currently fighting with the Bigmom Pirates in both the Manga as well as Anime, Luffy has also pissed off Kaido by defeating Doflamingo and the next arc after Wholecake Island Arc is the Wano Kuni Arc as confirmed by Mr.Echiro Oda creator of OnePiece, So we will be seeing strawhats pirates in action with kaido in the next arc. Another Yonko that we will be seeing Strawhats fight is the BlackBeard Pirates, As per the story line of Onepiece we can already guess that Blackbeard and Akainu will be fighting Luffy soon as Akainu was responsible for killing Ace and Blackbeard was responsible for Ace's  death as well. Blackbeard has been shown to be a very strange and evil character so it would not surprise if he would be the last villain in the onepiece story line.
Whitebeard was the one who showed us the true power of a Yonko when he fought against the marines in Marineford war. Based on whitebeard's power we can already guess that it would be a very difficult task for Strawhats to defeat a yonko, as even the Admiral's fear them. We have also been shown glimpses of Bigmom's Power and based on what we have seen Luffy wont be able to defeat Bigmom in his current state alone. I am one among few people who believe that strawhat's will require some allies in order to defeat yonko. We also saw how hard it was for luffy to defeat Sweet Commander Snack, to be fair he was also assisted by nami in that fight as she helped making snack's biscuit barrier softer so that luffy could feast on it and get energy and that might be the only reason why luffy was able to defeat Snack, he got his ass kicked in the recent manga chapters by Strongest commander of Bigmom Pirates, Dogtooth. Based on these facts it is extremely hard for luffy to beat yonko without either evolving his Haki or by introducing another gear.
We have already been shown that luffy has got some allies already as there was a strawhat grand fleet formation just after the dressrossa arc, Heart Pirates and Strawhat Pirates are already allied to take down kaido and after seeing Luffy and Trafalgar Law bond it is also possible that law will help luffy later in onepiece story line as well. In order to take down Bigmom Tank Pirates and Strawhats have allied as well, It is not still clear if Capone is interested in helping luffy or not as he has been shown to be a very obnoxious and doubtful character, But based on what we have seen luffy do in the past i believe Capone will tie allies with strawhats in the future as well. I believe so because of what Mihawk said in marineford that Luffy possess most powerful weapon and that is power of converting all enemy's around into his allies. Wano Kuni is believed to start after the Wholecake Island arc as said by the creator, hence we might also get introduced to Kaido really soon. We have not seen Kaido's power yet but based on his character introduction and fact that Bigmom referred to him as a 'Thing', I believe he would be nothing like facing other yonko and most hard among all to deal with. I believe X-Drake, Kid , Hawkins and Apoo will also tie allies with law and luffy in order to take down kaido as kid has already lost to kaido and is locked inside a prison right now, X- Drake seems to have tied allies with Kaido up until now but I don't think that he will be fighting for kaido as he has similar reasons to Law. Just like how corazon was killed by doflamingo, Drake's father was also killed by doflamingo and because doflamingo is connected to kaido law wants to beat kaido, i believe drake also wants to do the same and avenge his father. Apart from supernovas, I believe that Marco will also help luffy in the future as Cat Viper Neckomamushi is on his way to find Marco hence, the mink tribe and marco will also get involved in future fights of the strawhats. Last but not the least like many people shanks and revolutionary might also help luffy as well in the near future. I know that there are lot of people that i think will tie allies with strawhat's, but if you think more then it will be extremely necessary for luffy to tie allies with them in order for him to defeat the yonko, world government and lastly become the pirate king.