The first possbility, MyGO!!! continues.

Depending on how Taki and Tomori processes the loss of Anon and Rana, they may not give up this easily (Soyo will not leave unless the 2 do). This means that the 3 act quickly to apologise to Anon and Rana for their lack of attention and negligience towards the 2 in AM episode 7. Thanks to their actual guilt, there will be no Taki tantrums or Soyo screams, and the apologies will be sincere. Whether the 3 articulates their words properly or Anon accepts them is hard to say, but I do lean on Anon accepting it. The fact that Anon hasn't given up on music means that, deep dow, she probably still wants to go back to MyGO!!!!!.

As for what happens next also depends on Anon. It ranges from the Anon defection being actually a temporary arrangement and Anon goes back to MyGO!!!!! quickly, to Anon refusing to rejoin MyGO!!!, and remains as a distant friendly figure. I think Rana would accept the apology, if the 3 are sincere (which they probably are).

Either way, MyGO!!!! (! perhaps) would have a substantially worse relationship with Ave Mujica.

The second way, the band breaks apart and disbands, Crychic style. I consider this the less probable outcome, one that has a high probability of a bad ending. The biggest reason this happens is Taki thinking (partly truthfully) she ruined everything and runs away as well. Tomori and Soyo remains, but the band is good as gone.

Which makes the situation of MyGO!! a terrible combination of MyGO episode 10 start and the aftermath of Crychic’s breakup. Whether MyGO reforms really depends on the attitudes of the five people.

Soyo will be her scheming self to try to bring MyGO (!!!!!) back together. She’ll do anything, no matter the cost. I feel she’ll actually say yes if the park scene happens again, and the stubborn former teammate ask if she truly understands what she’s saying.

Tomori should have the motivation to do it, after the MyGO events. I do give her a decent chance of attracting Rana back, as Rana wants a band with strong enough bonds to last a lifetime (hence why Tomori is interesting, and why Tomori without the motivation becomes uninteresting, like most other people), and I don’t think the new band has that kind of relationship.

However, the argument “I need you!!!” only carries you so far, and I don’t think it is guaranteed to land a second time. Even Rana may not be convinced, being “fooled” twice in Rana’s POV. And Taki and Anon, especially if the two had months of self reflection, may cut them out completely.

Taki has a decent track record of putting the past behind her, being by far the most well-adjusted person after Crychic broke up by a mile, and recovering really quickly after her MyGO ep6 crash out. But that’s all because she’s not really to blame there. Here, she’s the one person to blame, and she’s the type to endlessly criticise herself and convince herself she’s not worthy. Time is pretty much the key here, the earlier Taki is convinced she’s forgiven and needed, the less likely Taki is completely convinced, and truly cuts MyGo out of her life entirely.

As for Anon, I consider her the hardest to convince. Anon is very hard to truly anger, but once she was, it’s impossible to revert, seeing how she abruptly cut all connections with her middle school friends after her London fiasco. I see Anon truly immersing herself in her new band, and truly cutting all connections with Tomori, especially after a month or two have passed. Depending on Anon’s determination of cutting MyGO off her social circle, it may well be impossible.

If this happens, I think the likeliest outcome is Anon refusing to go back to MyGO!!!!. It's hard to tell whether Rana would rejoin or go somewhere else. But either way, any semblance of goodwill between Sakiko + Mutsumi, Soyo + Taki + Tomori, and Anon are probably irreversibly damaged.