Guess he (or those behind him) is (are) communicating X-files alike hype … goes with the transhumanistic flow of ea-determinists that actually made him what he is … cant catch different personal obsession with his X’ses [1] after all he is the first famous individual spokesperson and famous individual investor (right after darpa) in full merging of man and machines …
On the lite note … TX or XT should be the label? or Twitter will completely fall off? TwiX yeah!, also X could be explained as minimalistic representation of the head and the wing of the Blue Birdy now with open legs 
On other side its enough to be added on the wide bar some eye and on the narrow one some wing trail, yet even like that it would be wrong rebranding for the community and its history … experiment tho that can prove beneficial for his own pr …