Well, either Harmonix is still working on DLC or they aren't. I (like many many others) don't think they'll stop supporting The Beatles this soon.
To explain the delay, I'm hoping they're working on something like this:
A Hard Day's Night / Help! film track pack.
A DLC pack consisting of songs from these two movies. Instead of just being songs + dreamscapes like DLC released thus far, this pack will have some new features:
- new story mode that follows the films
- in lieu of dreamscapes, including settings FROM the films like: the train in AHDN, the stage from their performance in AHDN, studio in Help!, apartment in Help! (complete with goofy sunken couch ), skiing scene, bahamas scene, etc.
- new unlockable photographs regarding the movies
- film clips from the movies
- new achievements!
This would explain why it's taking them a bit longer than we hoped to release more DLC. It would also expand on the songlist, and add songs from albums that are under-represented on-disc. (I count 2 songs from AHDN and 1 from Help!).
This might be a pipe dream, but I think it's a really good idea. Are you reading this, Harmonix?