You could go either way, really. Starting with Lance's death would set a darker tone - that this is a story that contains character deaths and brutal ones at that.
If you start by building up the relationships, it'd set a more superhero-y tone. Starting from the 'origin story' for the powers and those first moments learning to become a hero would follow the tropes of superhero comics more closely, and using or subverting the reader's expectations from those tropes could be a tool to use.
You could also reorder the scenes sometime after writing them. That's something I do when stuck on a writing dilemma like that. I figure that if I write down more of the story, I'll have a better idea of what tones or themes would be effective in it, and then use that information to fix things in editing.
You could go either way, really. Starting with Lance's death would set a darker tone - that this is a story that contains character deaths and brutal ones at that. If you start by building up the relationships, it'd set a more superhero-y tone. Starting from the 'origin story' for the powers and those first moments learning to become a hero would follow the tropes of superhero comics more closely, and using or subverting the reader's expectations from those tropes could be a tool to use. You could also reorder the scenes sometime after writing them. That's something I do when stuck on a writing dilemma like that. I figure that if I write down more of the story, I'll have a better idea of what tones or themes would be effective in it, and then use that information to fix things in editing.
Just want to let you know, there’s a super hero series called invincible, which sounds pretty close to unstoppable. Might wanna consider that.