With two very successful test phases now under its belt, it feels safe to say that Marvel Rivals is likely going to be a pretty big hit when it releases towards the end of the year. One of the biggest reasons behind Marvel Rivals' success so far has been its extensive and relatively well-balanced roster, containing a total of 23 playable characters, each equipped with a handful of unique special abilities and a powerful Ultimate that's capable of changing the tide of battle in an instant.