Well, Digimon Xros Wars(pronounced cross wars) is on the way. It airs in Japan in 4 days. Here's a few images and videos. I will add as many things as possible.
Promo poster
Main characters:
Taiki Kudou and Shoutmon
Tsurugi Zenjirou and Ballistamon/Varistormon
These two combine to make Shoutmon X2(cross 2)
Akari Hinamoto and Dorulumon
These three combine to form Shoutmon X3(basically X4 without sword)
Starmon and Pickmons
And all 4 combine to form Shoutmon X4
Bad Guys:
Kiriha Aonuma and Greymon
Others:
Nene Amano and Monitormon
Dondokomon
This season's Digivice, the Xrosloader!
Confirmed Digimon:
MailBirdramon
DarkKnightmon
MadLeomon/MachLeomon
Tactimon
Sparrowmon

Videos:
http://www.youtube.com/watch?v=7cAZ8qsAMeI&feature=related
http://www.youtube.com/watch?v=eXo3cwxsjjw (This one REALLY peaks my interest, because in one segment, you see Lalamon, Agunimon, Garurumon, Hawkmon, Patamon, Agumon, Gatomon, Veemon, Guilmon, Gaomon, and Angemon, all of which are main Digimon from other Seasons, is it possible that Xros Wars spans multiple universes? You decide.)