They can choose to not deliver "enhanced" search results -- showtimes, links to buy tickets, links to IMDB/RT/etc., that appear outside of the "native" search results.
As long as they don't mess around with the native search results, they'll be safer from an anti-trust perspective.
Doesn't matter - it'd still be "trivial" to put together a sufficiently complicated case to have it survive dismissal attempts and drag it out for years.
The point is they're not just at risk of losing an anti-trust battle, but simply of having their execs embroiled in it for years.
As long as they don't mess around with the native search results, they'll be safer from an anti-trust perspective.