We know there is Gordon and Collins chatter plus I have seen rumors that the Bulls are listening on Markkanen
https://www.blogabull.com/2021/3/23/22346566/nba-trade-rumors-bulls-listening-on-lauri-markkanen-offers and that Indiana may be discussing trading Sabonis
https://clutchpoints.com/pacers-rumors-indiana-not-ruling-out-blowup-with-trade-stance-malcolm-brogdon-domantas-sabonis/I also heard that Siakam was fined so maybe they are thinking about moving on from him.
Here are all the potential big options that have been rumored as available in one form or another (which I know, doesn't necessarily mean all that much), their age and approximate average salary for the next few years. Even if all these are not really available, it provides some context to those that may be.
Sabonis 23 $20M
Vucevic 30 $22M
JGrant 28 $20M
Gordon 25 $17M
Markkanen 23 $?? (RFA)
Collins 23 $?? (RFA)
Siakam 26 $34M
Siakam is too rich and probably not all that available but a swap for Kemba would work. The Gordon trade possibility has been beaten to death and to a large degree, so has Collins. Collins and Markkanen could be gotten this year without going over the tax likely but then we do need to sign them to lord knows how much. Vucevic and JGrant are likely not available and maybe a little older than ideal for us. Sabonis is a surprising name to come up but it did.
Outgoing, we have Kemba and Smart that seem to be in play plus picks. I hope there is a combination that lands us one of these guys. I have said a few times that I actually like Kemba for Markkanen and Porter. I also like Kemba for Gordon and Fournier or Smart for Collins and Bogdanovic. (assuming some picks or young players are needed in most cases). I would do Kemba for Siakam of course but not sure why Toronto would.
Lots of interesting "size that can shoot" options here. I hope one goes down.