I haven’t seen the movie yet, hope to soon, but from what I have seen on the trailers only LUcius and Bellatrix show up for the fight. Is that the case? Because I would have loved for them to show the whole fight scene like the book, especially where the death eater gets his head stuck in the time turner and his head goes from being a baby’s head to a full grown head. That would have been funny to see.
We ain’t sayn’ ‘til you see it...
No, there are more Death Eaters there, but the fight really only takes place in three locations, the Room of Prophecy, the Room with the Veiled Arch and the Great Entry Hall for the final battle. They may have thought it would be way too disjointed for film to have it moving all over the place in the different rooms. Even with just those three, it moves pretty fast, and is VEY exciting!