Yes, look at Star Wars TFA. Look at the Twilight movies. Look at Terminator 2. Most franchises are going to make more with their sequels.. The Dark Knight made infinitely more than Batman Begins.
And no this isn't the "7th Batman" movie in the franchise.. everyone knows that this is a new Batman and a new universe. Nobody thinks this was a Nolan sequel. What's wrong with you two?
TFA is the start of a new trilogy after the Glad bag prequels. All the Terminator movies made less and less money after Judgement Day. Although all the Twilight movies grossed pretty much the same, the same thing happened there. TDK...we all know about TDK.
Alien, American Pie, BTTF, Beverly Hills Cop, Mission Impossible, Friday the 13th in the 80s, all made less as time goes by. A random sequel (2nd, 4th, etc.) making the most is more common, especially the 2nd, but I don't see anything that indicates franchises make more as they go.
As for the "7th Batman" comment, I don't know what you're talking about. I never implied it was a Nolan sequel.