While at CES, Sony introduced the 4G LTE Xperia Ion on AT&T, the Xperia S, as well as the Xperia NX and Xperia acro HD for Japan but no need to worry Sony will not be empty handed at MWC 2012. Whereas last year, Sony had announced the trio Xperia play, pro and neo aside from the European version of arc hoping some more this year.
However, since the Sony Xperia Ion and Xperia S are official (after leaking on the web more than once), what the company has in stock for MWC 2012 is a mystery at this time. That being said, we will have to sit tight and be patient for the next 47 days.