Sure I don't disagree that T2 might be on their radar, but its likely for the big IP they have gaming wise. The cross media stuff is a plus.
Sony has been going ham on that cross media stuff for a while with Uncharted film, Horizon show, God Of War Show, Last Of Us etc, maybe you are on to something and they wish to leverage their IP more and Sony might be more ok with such a deal if they see those shows successful and see those IP have value beyond gaming.
You could be on to something with that Mibu.
I think the cross-media stuff is the only way you justify the price tag.
If I was building out a pitch to the Sony board about buying T2 I'd mention
GTA Movie and maybe a TV series
GTA6
GTA4 Remake
Leveraging GTA technology for The Getaway
Red Dead Redemption 3
Red Dead Revolver and Red Dead Redemption Remakes
Red Dead Redemption TV series or movie
Red Dead Online
Bully Remake and Bully 2
Going after the FIFA license and the creation of FIFA 2K + advertising deals
Partnership on advertising with NBA and NBA2K
Partnership on advertising with WWE and WWE2K
Partnership on advertising PGA and Tiger Woods on Tiger Woods PGA 2K and probably move development to ClapHanz
Rebranding of MLB The Show to MLB 2K or MLB 2K The Show advertising deal with MLB
Going after the NFL licensing deal when Madden's exclusive deal expires
Bioshock Reboot and cross-media
Borderlands fix
Civilization
Mafia Reboot with movie spin-off
Max Payne Reboot and new Max Payne TV series