Such a popular question. Unfortunately no one can answer definitely. Expansions get reprinted but at inconsistent times.

Also this is the first I have heard of Revelations being unavailable. I was able to pick it up last year around this time from Amazon for cheap. Looks like it’s a bit more expensive now though so it may be out of print.

Upper Deck UPD91758 2019 Legendary: Revelations, Multi https://www.amazon.com/dp/B07W86CTWY/ref=cm_sw_r_cp_api_glt_fabc_0XQNAH8WDKMY1MDKEMMV