http://blog.livedoor.jp/od3/archives/52037877.html
Not much information here other than the announcement, apparently it includes both gameplay systems? The wording is a little confusing but I guess we can expect more details shortly.
EDIT:
Coming in 2014.
Not much information here other than the announcement, apparently it includes both gameplay systems? The wording is a little confusing but I guess we can expect more details shortly.
EDIT:
Has single player mode, and a multi-player mode using gameplay from both series.
http://ameblo.jp/sinobi/entry-11611160699.html
There are a few more details there, apparently a player plays Tetris while another plays Puyo Puyo in one of the game modes, but you can also play either Puyo Puyo OR Tetris.
Coming in 2014.