There is one poster with tripcodes, and (later) one without tripcodes.
They might be the same person.
This is possibly the authentic Q, having been 'locked out'.
This is also possibly a fake/DS 'Q', trying to undermine our faith in Q - both now and in the future.
If we accept the story that Q was 'locked out', and that 'someone else' can post as Q (with the tripcode), then we won't believe any future posts from Q.
How do we resolve this? ---> Patiently.
The real Q has proved himself in the past with undeniable proofs. If he is truly 'back', he will do so again. In the meantime, be skeptical - even if the posts sound authentic.
Beware of your own confirmation bias - wait patiently for undeniable proof.
Note: I'm getting a few downvotes (without explanatory comments) on a perfectly rational post. Therefore, I may have hit a nerve.
You raise a good point, HP.
One reason for that could be that it's not the real Q.
Another reason could be that Q is well aware that Q's following is multiple times larger now than at the point when he/they stopped posting, and so he/they is starting slow.
Either rationale seems plausible to me.
That being said, if it is indeed the real Q, I would expect future drops to become far more interesting and informative.