Multiple TV Universes: Good? Troubling?

I think it was only a matter of time before someone made this thread so I figured I'd give it a go. It's apparent that WB/ DC Entertainment is going full throttle with television adaptations. We currently have Arrow, Flash, Gotham, and Constantine. We will soon be adding Supergirl and Titans is pretty much a given I think. With the exception of Arrow and Flash, these will all be occurring in their own universes and continuities. Now, the elephant in the room is is this a good thing? Normally, I would say its absolutely a good thing, and still believe it is but then I got to thinking what if let's assume all of these shows are successful and run for multiple seasons. We will inevitabley come across the issue of multiple characters appearing on different shows.



Now, I don't think anyone's really going to care if there's three different Clock Kings appearing on Arrow, Gotham and Titans, but the heavy hitters like Deathstroke. Will it become weird when Titans introduces their Deathstroke and its not the acclaimed Manu Bennet?



Or, option B) Will using one character on one show eliminate the possibility of them appearing on another? Does Titans eliminate our chances of ever seeing Dick Grayson on Arrow? Will Deathstroke not be allowed to appear on Titans? Can Zatanna appear on both Constantine and Gotham?



What do you guys think?