Evans turned his back on the Red Devils to join the Millers last April, claiming he was moving to a bigger club, and has the chance to deliver promotion in front of 12,000 fans at New York Stadium.
The Millers only have to draw with rock-bottom Aldershot to end their seven-year exile from League One.
"It's a massive game, the atmosphere will be electric and we know the prize," said Evans.
"It's a sell-out, but we could have sold another five or six thousand tickets. We know there will be people locked out.
"The atmosphere will be incredible and what we all desire and strive for. That's why I came here."