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.
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
Kiriha Aonuma and Greymon
Nene Amano and Monitormon
This season's Digivice, the Xrosloader!
(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.)