"It's going to be sad seeing [Ledger] on-screen, but I think the performance is so powerful -- from the clips that I've seen so far -- that audiences will almost forget that it's Heath Ledger," E! movie critic Ben Lyons said. "That's the sign of a great actor, and that's what he was."
Entertainment journalist Eddy Friedfield agreed.
"That's the nice thing about his short but impressive career," Friedfield said. "He gets to go out on top."
To that end, Lyons added, "You heard it here first. Look for Ledger to get an Oscar nomination for this performance."
Amid all the heroism on display on our screens this summer, cineplexes will also welcome two men who are decidedly anti-heroes -- a huge, red-horned guy known as Hellboy, and Hancock, a superpowered dude with a big PR problem.
In "Hancock," the "hero," played by Will Smith, has superpowers but feet of clay. He's homeless, he hits the bottle, and everything he does backfires. Hancock is forced to hire a PR rep, played by Justine Batemen, to do some damage control.
On the subject of damage control, can this film about a flawed superbeing draw the crowds Fourth of July weekend? Smith, known as Mr. Fourth of July, is putting his title on the line here.
But film expert Russ Leatherman, also known as Mr. Moviefone, said it shouldn't be a problem, considering "Hancock" is the only major flick coming out that weekend.
"You know what happens when Will Smith does a big blockbuster these days?" Leatherman asked. " People get out of the way."
As for that other anti-hero, Hellboy, he's back in a hotly anticipated sequel called "Hellboy 2: The Golden Army." Ron Perlman returns as Hellboy, and Oscar-winning director Guillermo Del Toro once again takes the helm. This second installment promises to be bigger, badder and, well, more hellish than the original.
As Perlman told ABC News Radio, "We said, 'This is either gonna have to be jacked, or there's no real reason for us to be here doing this.'"
Perlman believes that Hellboy's unconventional approach to heroism is better than that of goody-two-shoes Iron Man and Batman.
"He just a funny dude," said Perlman. "He'd just rather eat a pizza and drink a beer than go out and save the world. But he's badass. I would put my money on him."
Del Toro and Perlman are so optimistic about "Hellboy 2" that they're already thinking about a trilogy.
Said Perlman, "I hope it gets made, because it's too good an idea to sort of fall by the wayside."
ABC News Radio's David Blaustein contributed to this report.