The correct answers are: By the time I reach 2050, the syndicate will have already stolen the artifact. At precisely midnight tomorrow, I might be interrogating the cyborg boss. The temporal portal is highly likely to close before I can jump back.

"Will have already stolen" correctly uses the future perfect to describe an action completed before a specific point in the future.

"Might be interrogating" pairs a modal of possibility with the continuous aspect to describe an action in progress at a future time.

"Is highly likely to" correctly expresses strong future probability.

"Will have been being" is incorrect because be is a stative verb and is rarely used in the continuous form for the future perfect (it should be will have been undercover).

"Must to be" is incorrect because true modals like must are followed by the bare infinitive (must be restored).