Yup, typical length for the annual Chapter reveal. I'm excited to see what's next.
ZOS has spoken before about how ending the quarterly content rollout has helped allow time for quality of life improvements and Q4 fun. I didn't need Q1 and Q3 4-player dungeons. I barely engaged with the small mini-DLC that was Q4. So them giving us things like the Infinite Archive in last year's Q4 seems like a smart move.
I will almost certainly be pre-ordering the Chapter, as I always do. I know (broadly) what I'm going to get from the game at this point, and I'm still having a good time.
Happy 10-year anniversary, ESO. (come April)