I think a few things are clear:
-The Spurs are not going to have a losing season with Wemby on board, so relying on future drafts with their own picks to find the second guy is unlikely
-They are hitching their wagon on the current group of young guys. The young core might be here for a long time. I think the Spurs will want to show Wemby how different they are from the rest of the NBA, and keeping continuity or big parts of their roster intact is the “Spurs way” vs other teams where they’re constantly shifting things around. Wemby loves the Spurs for a reason, and it isn’t only because they won championships. Anyone who is a fan of the Spurs know the Spurs are the Spurs because of the unique things they do.
Tbh, the bar isn’t high anymore for a second guy to rise up. Jamal Murray isn’t a spectacular player compared to big time second fiddles like Shaq, Pippen, Paul Pierce. Who was second fiddle to Butler? Jalen Brown is about to be an overpaid player because he’s overrated. Anthony Davis is probably the only “second” star that qualifies as one who is better than or equal to the primary star on the Lakers (LeBron).
and finding the second star doesn’t always have to be through a top 5 pick in the lottery. There are a lot more ways a second star can be found, and most oftentimes, they can be homegrown. It’s not out of the question yet for most guys on the current roster. Someone may rise up and surprise us. Or it could be a guy we draft with the 20th pick in coming years.
There’s always an option of signing or trading for an established player, similar to what they did to get Aldridge. I’m sort of not a fan of this route because of what we could potentially give up and the chance they might bring their own ego to the team that the team wouldn’t be able to control. I think this path is more suited to when we have our 1 and 2 already.