I have given up on waiting on the R3 Warner-DC animated series sets.
Although i was able to complete Batman TAS (Seasons 1-4) and get Superman Season 1 on R3. It was too long a wait for the rest so I just bit the bullet and got the remaining Superman seasons from Amazon.com (on sale at $14.95!). After that it was downhill all the way wth Justice League (Seasons 1 and 2), Justrice League Unlimited (Seasons 1 & 2) as well as The Batman and Batman Beyond.
Was also able to get all the Batman TAS movies on sale on amazon ($7.99 each): Mask of the Phantasm, Batman-Superman Movie, Mystery of the Batwoman, etc..
Will not hold my breath on this one and just get it from Amazon.com as well