This is pretty big for the league. Another investor willing to put money to back this league.
The NWSL's predecessor was the WUSA (as well as the WPS). These leagues suffered from financial issues and the WUSA ended their season in 2003 with operating losses of nearly 100 million.
To see so many high profile celebrities back this league is really positive sign for it. I'd say the biggest positive for the league in it's 20-21 offseason was the huge influx of backing that came from investors all over, from Serena Williams to Naomi Osaka. Ovechkin is now part of a group of investors that includes Chelsea Clinton, Jenna Bush, and other high profile DC individuals.
This is great news for the league that continues to get investment from all over.