Zemo was able to BFR who couldn't return.
Interesting note here is that Zemo can see all possible outcomes if chooses because he can see all possible futures reality with moonstones. In this gauntlet this is would extremely handy as soon as the fight starts he would know every possible outcome of the match and "fix" what needs to be done to win.
Here he BFR Grandmaster who time manipulation powers knows no bound here is an example of what type of power he holds over Space/Time/Life/Death.
Even GM couldn't return from this BFR without the Moonstones.
Zemo can pretty much kill people with his BFR by separating every piece of your body.
Not sure how any heroes without extreme power over reality could get out of this