We do not know what, if anything would be announced. Canon keeps this information very quiet, so its just rumors, some may be true, but many do not pan out. Just read them and have fun, but don't make buying decisions based on rumors.
know what u mean, just dun want to end up buying the lens and have the new one announced in mar/apr
if you can afford to wait, then just wait. clearly the lens is not that critical for what you are doing. if you really, absolutely needed this lens, you would know it, and it'd be in your shopping cart already. to me, that's always the test of how much you need a lens.