Heathers: An oral history:

WATERS: The ending I should've fought harder for is where Martha Dumptruck pulls out a knife, stabs Veronica, and says, "Fuck you, Heather." And Veronica's on the ground laughing, with a knife in her stomach, saying, "My name's not Heather. My name's not Heather." [...]

LEHMANN: There was a long time in which Winona would say she wanted to do a sequel. It just didn't seem to lend itself to a sequel.

WATERS: I did come up with this crazy, cockamamy Heathers 2 where Veronica becomes a page for a senator named Heather, played by Meryl Streep. The ending is her assassinating the president and getting away with it -- and it's a good thing. [...]

I told Winona the idea without any more elaboration than I'm giving you, and a year later I hear from her: "So I talked to Meryl. She's in!" I'm like, "What?!"

Previously.