S1983 - State film incentives program / First Amendment
Although removal from state to federal forum operated as a voluntary waiver of sovereign immunity, monetary damages against a state don't lie under S1983, and as the film franchise has no plans for another project, there is no basis for injunctive relief.
Qualified immunity - by requiring films to depict the state in a positive manner in order to qualify for funding, the state violated no clearly established constitutional law.
No due process violation, as the filmmaker did not have a right to the discretionary grants.
No prior restraint of speech under the Texas Constitution.
http://www.ca5.uscourts.gov/opinions/pub/15/15-50120-CV0.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.