oh hell yes. it will be awesome fun. some bits of info I found
Sega Superstars Tennis has over 15 playable Sega characters including Sonic the Hedgehog, AiAi from Super Monkeyball, Ulala of Space Channel 5 and Amigo from Samba De Amigo. In addition to their own unique attributes, each character will also come equipped with its own superstar tennis skills.
Exhibition mode offers the chance to challenge Sonic, or the character or your choice, to a match on one of many courts, including Sonic's home court of Green Hill Zone, or Amigo's Carnival Park court. Wherever you play there will be a host of Sega celebrities cheering you on from courtside and by partaking in crazy doubles matches with your choice of partner, you could end up playing against some pretty unusual couples. Prove your Sega hero is the shining star of Superstars Tennis by collecting silverware in the Tournament Mode. There will also be the opportunity to unlock a host of extras which will be announced in the near future.