The cast of misfits who will populate writer/director James Gunn's mostly-new version of The Suicide Squad is filling up quickly. Just a day after Ant-Man alum David Dastmalchian landed the role of Polka-Dot Man, Variety reports that relative newcomer Daniela Melchior will join the project as Ratcatcher. Now, both those names might be met with a "who?", so let's start with Melchior: the Portuguese actress has actually been working since 2014, mostly on telenovelas like Herdeira and Valor da Vida. Rumors had Melchior in the hunt for The Suicide Squad role early along with …