Interested. Definitely, definitely interested. I'd be up for Wolverine in Wolverine/Storm, Young Magneto in Magneto/Emma Frost (if I remember my timelines correctly, that one will need some warping of the time continuum. Enter the OC mutant with temporal displacement powers...), or Beast in Beast/Storm.

I think my favourite of those would be Young Magneto, but any of them would be more than fine.