Her appearance in the cartoon was pretty close to the toy anyways, aside from her colors being dulled down, so I doubt a new "classics" version would look much different. She's a Mattel creation, not Filmation, so I don't think there'd be any legal problems whatsoever bringing her into the MOTU Classics line.
I don't think they should bog her down with a ton of weapons either, as her hair is her weapon. The way they presented her in the cartoon, as a Horde mechanic or whatnot, I thought was very unnecessary- I never thought of her as being a female Man-At-Arms when I first got the toy, so I'm not too keen on a new figure with Horde insignia's and a toolbox full of gadgets and stuff to make her "cool". That was the problem with the 2002 line, too many bells and whistles for a lot of the characters and they came out looking like a mess... my hope is that this being the classics line- a lot of the design elements/accessories are going to be stripped down and kept all "back to basics", as it were. Entrapta's pretty much perfect the way she was the first time around.