Matt Colville's publishing company MCDM Productions is launching a new online D&D magazine called Arcadia. James Introcaso will be the managing editor, and Esper Genesis’ Rich Lescouflair will be one of the contributors.
Couple things they've said about it... it's being managed by James Introcaso, it is an online magazine, it is only available to MCDM Patreon subscribers, and they aren't accepting submissions.
Here's a Reddit thread where Matt Colville talks about what is known thus far.
It's En5ider but without the three years of free back-catalog?