If I had to guess, both new attractions will go into Tier 1 (bumping Beauty, like you said) until Star Wars opens, at which point the roster looks like this:
Tier 1:
Runaway Railway
Battle Escape
Millennium Falcon
Toy Story Mania
Slinky
Fantasmic
Tier 2:
Frozen Singalong
Indiana Jones
Star Tours
MuppetVision
Swirling Saucers
Voyage of the Little Mermaid
Disney Junior
Rock 'n' Rollercoaster
Tower of Terror
Beauty and the Beast
Again, just my guess, but it keeps the DHS tradition of putting more rides in Tier 1, with Tier 2 holding around twice as many attractions overall.