Kind of talked about it a little yesterday.
My picks for who will wear the vacant Legends numbers are Chesson for #21 and Countess for #11.
The only reason I think they'd give Chesson #21 is because he's the only true receiver to have any significant playing time. This year is interesting because this is the first year we don't have a clear choice for #21 unlike 2012 and 2013.
Something I don't see happening but would make sense would be for Funchess to change from #87 to #21 since he is pretty much all but listed as a receiver, and Butt to get #87 since he's a TE.
This would drive many people crazy who already can't keep up with the crazy amount of number changes, though.