I mean its possible that you could get Houston to pay a portion of it, but that just means they'll want better compensation in the trade. Regardless, Ravens probably can't afford to sign anybody who has a cap hit of like north of $10-12M this offseason. So in order to get Watt here, you'd need to sign him to some sort of an extension to lower his current cap hit, or, ask him to take a straight paycut of like 50%, which he almost certainly would decline to do.
Its not impossible that he would be a Raven (especially if he gets released), but its certainly not a high probability either.