In any case, Richard Cockerill's men must exceed the Sharks' points tally by at least one to give themselves any hope of topping the pool.
Leicester are currently in superb form, undefeated in their last nine matches in all competitions, with their only loss in the last eight LV= Cup ties coming in round one against Saracens.
And 28-year-old Cornwell claims the Tigers, third in the Aviva Premiership, will be going out all guns blazing on Sunday even if Sale win, although they have no idea how the Scarlets will line up.
"We've watched the videos, but personnel-wise it might be a bit difficult to know who they are likely to pick," he said.
"But Scarlets will play a young side who like to chuck the ball around and have plenty of dangerous runners.
"Presumably they also have lots of hungry young guys fighting for contracts so we've got to be on our game.
"And depending on what Sale do on Saturday will obviously influence heavily how far we progress in this competition.
"We will turn up regardless of what happens in the Sale game and hopefully we will have something to play for as we have 20-odd guys fighting for a place who want the opportunity to play."
Scarlets meanwhile cannot progress to the semi-finals of the LV= Cup, and have won just one of their last nine matches in all competitions - a 9-6 win over Cardiff Blues.
The Welshmen have only managed one win in their last five LV= Cup ties, and have lost each of their last six encounters against Aviva Premiership opponents in all tournaments.
But despite the odds being stacked against the Welsh region, skipper Rob McCusker is hoping his side can bounce back to form and rekindle their season.
"Leicester have established a habit of winning, something we have let slip of late - we have become more accustomed to losing and we need to snap out of it," he said.
"They will be strong up front as usual, and they have backs who can finish so we will be wary of them.
"We want to end our LV= Cup campaign on a high as we need to get a win from somewhere. A win would set up the rest of the season for us.
"Winning against Leicester is extremely important in terms of the league - we have slipped down to fifth in the RaboDirect PRO12.
"If we can win it would boost confidence and help us get into the top four, maybe even the top two, and help us get to where we want to be."
At Parc y Scarlets, Sunday 1pm. Referee: Greg Garner (RFU) 11th competition game.
Assistant Referees: Tim Hayes, Greg Morgan. TMO: Tony Rowlands.
