I don't see the big deal.
As mentioned, the Slingerland name hasn't been used with any success in decades, and few drummers really have any familiarity with them.
The last attempted revival of Slingerland, by Gibson, in the 90's. they lined up Greg Bissonette as an endorser, they had Gibson's money behind them, and it went nowhere fast. They also briefly had Tre Cool from Green Day as an endorser and a re-creation of Gene Krupa's kit on the market, and it did nothing for them.
And, as mentioned, DW only bought the name, nothing else.
Even if John Good and co re-create a Slingerland-like shell, it's still a DW shell with a Slingerland nameplate. I mean, DW already makes similar drums in their jazz line and their maple/mahogany lines that were designed to recreate a past era of drum building. The differences are going to be minimal.