Not very hyped, I've always loved AC, the formula had gotten stale and I loved the shift to 'Witcher 3 open world RPG' style, not keen on back pedaling to the past... but as I keep saying, I'm still getting it on day 1 and I'm expecting to enjoy it once I get into it. Just not feeling hyped.
Also, I thought Basim was a POS in Valhalla, not exactly chomping at the bit to play as him, younger or not.
EDIT: One reason I didn't care for Basim was his voice. It just annoyed me somehow, no particular reason I can think of beyond not appreciating the sound of it and the way he spoke. I just checked on IMDB found the actor who played him in Valhalla, and so far his name is not associated with Mirage, so that's a good thing. I assumed he wouldn't be playing younger Basim, but I also assumed there would be some "flashforward" cutscenes of the older POS we Valhalla players are familiar with.