Awesome episode.
Some predictions:
Hayward is hydra and his interest is turning vision's corpse into a weapon he can control.
Pietro is Mephisto. There was so much talk about him being a bad influence and he was teaching the kids to be devilish.
Their contact will be Reed Richards. Maybe the whole fantastic four.
This incident will either result in the creation of mutants or give the fantastic four their powers (in addition to giving Monica hers).
Agnes is indeed Agatha, she helped get the illusion started for Mephisto and was initially helping control it but become overpowered by Wanda and fell under her spell.
Even crazier idea: Hayward is working for Dr Doom (or he will become dr doom) and he wanted vision's corps so he could create doombots from the technology
Thanks and gig'em