 The gameplay and aesthetics of Marvel Super Heroes vs. Street Fighter remain similar to X @-@ Men vs. Street Fighter . Each player selects two characters to compete in a one @-@ on @-@ one tag team fight , attempting to defeat the opposing team . The game replaces most of the X @-@ Men cast from the previous installment with characters from other Marvel properties . In addition , it introduces a new gameplay mechanic known as the " Variable Assist " , which would be used in future Marvel vs. Capcom titles . 
