@DomainVP offers very good theoretical advice above .. but taking a step back and looking at the bigger picture this is an extremely clear case of the non-legal term "cyber-squatting". You very clearly bought the domain based on MineCraft game while also expecting there to eventually be a movie. So while you could sidestep some of the legalities by doing or not doing certain things .. it does not change the fact that you deliberately went out of your way to try to eventually profit from someone else's trademark.
Don't feel too horrible .. just about every domainer has bought a trademark or someone's name when they start while not fully understanding the reasons, laws and scope of trademarks. But at the end of the day it is both legally and mostly morally wrong to buy a domain associated with someone else's trademark while the reason for getting that domain is to be affiliated in any way with their business. Particularly if you stand to gain even a single dollar from the sale of the domain or via advertising, etc.
That's why it would never be a problem to buy Apple.com if you're going to use it to sell fruit. But if you buy it to sell computers, that's trademark infringement.
The big difference in this case is that "Apple" is a generic word where no one (particularly a judge or UDRP panellist) could ever assume you bought it to sell computers (and the fact is that you most likely didn't). But when you get to compound words or full names then the opposite is true and if the trademark is even moderately known, then it is very reasonable for a judge to assume you bought the domain with the intent to use it (or to sell it to someone who will use it) in a way related to the business operations of the trademark holder. MineCraft definitely falls into this category .. MicroSoft would be another example.
The trademark doesn't even need to be legally registered, as long as a company or someone is use the term in business then you are likely in the wrong. That's why I'm now against domainers holding full names. Because while single names (first alone or last alone) are generic enough to be used independently as a new mark .. full names are 99% of the time registered with the intent of selling to a specific person.
Considering you've openly posted the domain here in a public forum AND that you've admitted to monetising it in the past .. and that you've also admitted to knowing that you knew what the MineCraft game was (essentially declaring your pre-awareness of the trademark) .. your safest bet at this point is to let it expire or even outright delete it from your account.
Even contacting them to give them the domain for free could be a risk as they could still try to sue you as an example. Granted, the more likely outcome is that they will thank you and give you movie tickets, but I've heard of some media companies wanting to make examples of trademark infringements, so you need to ask yourself if it's worth the bother/risk for a couple of movie tickets.