Will we see Rex in Ahsoka?

With all the hype of a very possible scene(s) with Anakin in Ahsoka. I wonder if we'll get to see or a mention of Captain Rex.

Undoubtedly  Rex may be Ahsoka's closest and oldest know friend, and if they're making basically Rebels season 5 and having Huyang, Sabine, Hera, Ezra, Chopper, Thrawn, *Anakin* (possibly) and Ahsoka. With the possibilities of Clone Wars flashbacks/moments, I and maybe dozens would be a bit disappointed if Rex doesn't appear via mention or a couple minutes  of screen. Lately Disney SW has hit us with the Return of Luke, Qui-Gon, Boba Fett and Ahsoka, So hopefully they can give us one more surprise with Rex.

And with Temuera Morrison last portraying a homeless clone in Kenobi, I'm sure some of us thought it was Rex

So what do you guys think? Will Rex appear in Ahsoka?

On the side note, If Temuera Morrison is rumoured to appear, it's just a rumour. I'm not going to get hyped for a rumour just to be disappointed.

(Plus did Barris die? This is just an off topic question)