Not really sure about the new Explorer's Guide to Wildemount? Maybe you're not all that much a Critical Role person. You'd like to get a little look inside just what you'll get before you plonk down your funds. Well, that can be done as well as Roll20 has posted up a free preview adventure for it that you can add to your account and download now.
From the website:
A first taste of the wonders of Wildemount!
Dungeons & Dragons Explorer’s Guide to Wildemount Adventure Preview is the best way to try out the world of Critical Role’s Wildemount Setting.
Explorer's Guide to Wildemount Adventure Preview features everything you need to run the Frozen Sick starting adventure including the full adventure text, and the Palebank Village section from the Wildemount Gazetteer.