Nothing could beat TMNT until it went off the air.
It was also an unfortunate time for rival superhero team cartoons. Remember "Stunt Dawgs" and "Biker Mice from Mars"?
I do think the contemporary 'anime' craze that was getting underway at that point also gave it a better shot..even if just for that one year. At least here in the U.S., it would take two more years, DBZ making the move to Cartoon Network, and this little thing called Pokemon to catch worldwide hype for anime to really boom. I'd say SPC, Sailor Moon, and the time Dragon Ball / DBZ was in syndication, planted those seeds.
Sailor Moon's commercial success really kicked off the import boom of the 90s. It most likely pushed Saban to resurrect the show, even just to break up what would have been 90 minutes of teens fighting robots. Too bad SPC was never big enough here to spawn much in the way of toys and merch for the North American market
That said, it's interesting the choices some TV execs and programming directors make...what to air and what time.
I'll say. I had to get it via antenna from WNYO in Buffalo at 6 AM, but my friend (who had cable) got it at 3 PM from Fox Rochester. Even after it went off-air in the US, it ran at 2 AM on YTV in Canada for another lap of episodes before it got canned there too. If they ran at 5:30 AM instead of Tom and Jerry, I'd be much happier... sun wasn't up, so the signal was much clearer.