It really depends on the personality of the rabbit. There's not an "always" answer for that. Generally speaking, an intact rabbit will be more likely to be territorial and fight, even with a fixed rabbit. I personally wouldn't bother trying to bond rabbits unless they were both fixed. Rabbit fights are nasty.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry