Sorry for the lack of updates, it's been a slow two weeks due to the holidays but I think this one is worthy of some Killerspec news.
So the solicitations for the Batman Beyond issues since #37 have been pretty vague on when we are going to get a reveal of the new Batwoman in this series.
But we got a hold of the last page in Issue #39, out next week on January 1st, 2020 that tells us when the reveal is going to happen, which all signs point to issue #40 as the big reveal issue.

So, several things will come out of this new information. We might see an uptick of value in Batman Beyond #37 and if this truly is a character that already exists in the world of Batman Beyond, we'll see the characters first appearance go up in value more than likely.
Will issue #40 see any value? It's hard to determine since you can still pre-order this issue online but do be aware that the FOC has already passed on this one back on December 12th, 2019.
There's likely been an uptick in orders for this series due to issue #37 gaining popularity but we'll have to see how the market reacts now that we know this is the likely issue when her identity is revealed.
You can also still find Batman Beyond #37 2nd Printing for cover price at TFAW. For those that missed out on the first printing.