I hope not. Anyone can create a tripcode. It's just a password that goes through a hashing algorithm and identifies you on a chan, and allows you to edit/delete posts under that code. I believe the first tripcode Q used was 'matlock'. Anyway, someone showing up on 8chan (and it's a CP cesspool lately, so look out), with a new tripcode could be... literally anybody. It doesn't hold meaning in and of itself.

If Q were to reestablish comms on a chan, it would take something way outside of a tripcode to verify it's Q, but then Q could use the tripcode to sign comms.