Agreed about the first part. However I actually think MCU not having all their properties is a great thing. It's motivating them to look at their lesser titles. I doubt we'd have gotten GotG/Inhumans if they had FF and Xmen in house.
Not sure how marvel is treating their fans any differently than DC tbh. If you mean the way in which they announced this slate of films, WB hasn't actually done it yet, they made a private call to investors(seems like a pretty responsible way to run a massive business imo), who knows what their plans for the fans actually are. I'd imagine it would involve Comic Con.
Or maybe they'd rather keep things a surprise and give fans 'that sort of experience'.
I'd like to see the Rock and all of them walk out on stage in that sort of setting, seeing as how it's filled with fans of all shapes.
Using a big exclusive song and dance to release your news can be looked at both ways. It's like suggesting SteveJobs Apple was thinking of 'fans' when he organized the expo/events for Iphone##, whereas BlackBerry....
Either way it's pretty fun to watch.