Translation:I want to travel to the future with a time machine.
Because the person wants to travel INTO the future with a time machine. The wording "in the future" means the the person wants to travel sometime later to the future.
Thank you. So how would I say 'in the future' or simply 'in future' (which I am much more likely to need to say)?
Shouldn't "I want to travel to the future ON a time machine" also be accepted? Similar to "Ich will mit dem Zug nach Hamburg reisen" (I want to travel to Hamburg ON the train)?