The successor to the original 8-Ball was present as one of the villains in the Bar With No Name when Spider-Man and Daredevil fought the patrons of the bar. Cue stick (equipped with mechanism enabling it to magnify any force applied to it more than a thousandfold and transmit that force to anything it strikes), ball-bombs (pool balls containing explosives which detonate on impact).
Nothing is known about Ms. Summers, save that she is a young mutant woman whom Bushwacker was contracted to kill by the Marauders. Bushwacker broke into her house and did so. Wolverine found her body and swore vengeance on Bushwacker. Summers was known to be a mutant, though her exact power is unrevealed. Given that the Marauders hired Bushwacker to specifically kill mutant creative geniuses, however, she likely had some sort of superhuman artistic insight.
