I'd like to remind everyone that we haven't gotten any teasers about chapters 6 and 7 in general. Toby initially planned to release chapters 2, 3, 4, and 5 together, then chapters 3, 4, 5, etc. And now chapter 5 will be a standalone release.
Toby is in other words clearly separating the story into chapters 1-5 and the rest. Gerson didn't write about what happens after chapter 5 either. It's looking very likely that the last two chapters will go full Evangelion.
It's pointless to try to speculate about what happens after chapter 5 since there is every indication that things will diverage so much, even on the normal route, that predictions will be impossible