With the exception of The Batman I haven't been an active Saturday morning viewer. The problem with this cancellation and void of such quality animated television programs is due to the fact that there's no strong leadership to shepherd them. I would love to see a totally Adult Swim sort of animation network that focused on the teen to adult market. There is a desire out there, but much of the product is axed or eaten up on the web.
I've been whining about that for the past year and a half. It's all due to the FCC and all these stupid rules and regulations that make children's programming unprofitable. Throw the internet, video games and shows about singers who can neither sing nor act, and you got the perfect storm for the death of animation. Kid's WB certainly didn't try very hard the past 2 years (Warners was only responsible for 3 shows out of 8 for example) and they recently said, heck with it and sold the line up to their competition.
I feel the Batman had a strong push behind it... if it didn't it would have been canceled after the second season (like most of WB's latest projects). Though I still say it really deserved a 6th season or mini season or something, coming off the heals of Dark Knight. The last season seemed a wash in JLA team ups that were hit or miss, instead of the bolder version they had in season 4, which is really when the show hit it's stride, and became more than what it was at the beginning. And it more than made up for the cliches and corniness of season 3... including the episode where Bushroot...errr...Poison Ivy turned everyone into plant zombies. A plot line that could have easily fit in with Super Friends or the 1970's Batman cartoon.