The big question is what is Marvel's plan now. I would imagine they are looking at alternate distribution arrangements as well given Diamond's recent troubles and shut down during the pandemic. The fact that most stores were open for business while Diamond was still closed was a bad business decision as a distributor. I don't blame DC for looking at alternatives when the current incumbent has been struggling and is not providing reliable service.
FWIW, stores here were allowed to stay open for curbside and mail order/online sales, and my file LCS said that they saw sales and profitability jump without weekly books. The reason - they made a big push towards TPBs and GNs two years ago and with people stuck at home they were ordering more of both online. Not having the weekly shipments single issues reduced their costs significantly. A couple of other stores that primarily do back issues sales did well with their eBay and weekly FB auctions, as well as online sales as they could still do curbside or mail order delivery. The stores that depend on gaming and weekly new books suffered and are still struggling.
This also furthers the trends towards GNs/TPBs and digital rather than monthly single issues. Marvel announced a number of titles going digital now that will be collected in TPB format later - no single issues will be released. I wonder what the monthly sales cutoff will be for that decision going forward? Soon enough, will we only see the top 15-20 titles for each company coming out as single hard copies, with the rest going digital?