Kaldur being the same generation as Dick and Wally makes sense. Garth exists but he doesn't become Aqualad because Kaldur was better and he becomes buddies with Dick, Wally and Roy. There hasn't been legit Aquaman sidekick representation until Damian becomes Robin.
Wally and Linda come together when Wally has a couple years under his belt as the Flash so him having a girlfriend when he's still Kid Flash is fair.
Thank God Zachary wasn't there. We were approaching dude overload. Thank you for your sacrifice, Mr. Harper. They could've made Kara Zor-El work. Sucks Cyborg showed up as a post-Tim generation character.