They have some good properties but I can't see a good reason for it unless it was for some massive Video Game Park. Konami's best franchises include Silent Hill, Castlevania, Contra, Metal Gear, Dance Dance Revolution. I've ranked that in order of properties I could see being a fit. Silent Hill and Castlevania could both be pretty neat, but outside of HHN I would doubt it.
It is interesting though that now we have seen partnerships and heard rumors about multiple huge AAA publishers.
Silent Hill (Konami) - happened
Resident Evil, Monster Hunter (Capcom) - happened HHN/Universal Japan
Nintendo - happening
Sega - Depending on Nintendo Licensing major mascots could be included
World of Warcraft (Blizzard/Activistion) - rumored