I think Opposite might be very interested in being owned by Tony Stark, but a) the hulk is fucking terrifying, Matt has no real desire to die, and b) the Black Widow also lives with Tony Stark and Matt would freak the fuck out because she would figure out almost immediately that He Was Not Who He Pretends He Is, and so Matt would have to fuck up the Avengers tower so very much to distract from that.
And also the idea of not being legally owned by *anyone* would make Opposite lose his shit in a big way. Like, in the fill of 'all slave Matts meet in Matt's place', Opposite is just ignoring that he's in a world where he's not actually owned, because otherwise he'll have more of a nervous breakdown than he's already having, and so he flatly refuses to deal with it. Being in a world where his entire mindest and mentality and training and sense of self and foundation of his self-esteem is completely useless and worthless? Yeah, Matt would not cope well.
Re: Slave!Matts get swapped into each other's universes
And also the idea of not being legally owned by *anyone* would make Opposite lose his shit in a big way. Like, in the fill of 'all slave Matts meet in Matt's place', Opposite is just ignoring that he's in a world where he's not actually owned, because otherwise he'll have more of a nervous breakdown than he's already having, and so he flatly refuses to deal with it. Being in a world where his entire mindest and mentality and training and sense of self and foundation of his self-esteem is completely useless and worthless? Yeah, Matt would not cope well.