Some prospective ownership groups have been told by NBA officials that expansion may not happen until 2025 at the earliest, according to sources.

The 2025 timeline coincides with when a new television deal can be negotiated. 

KeyArena in Seattle is being renovated and is projected for completion in late 2020 or early 2021.

But Seattle may need to have a second new arena with the NBA team as the main tenant if the city wants to outbid other markets to attract a team, multiple ownership sources said.

Beyond expansion, Seattle could be a destination for a team that relocates. The Memphis Grizzlies are the most obvious candidate, but relocating would force Robert Pera to sell his stake in the team.