England head into the tournament starting on May 30 as the world's number one ranked side in ODI cricket and favourites to lift the trophy.
"Absolutely no regrets, we're positioned in the best possible place at the moment," Morgan said at the launch of England's World Cup kit just hours after they unveiled their final 15 members of the squad.
Since the 2015 World Cup, England have twice set a new record for the highest total in an ODI innings.
"Our exceptional days are better than we could have imagined -- the world records etc -- I could never have seen those at the start of 2015," said Morgan.
"That expectation has shifted with level of performance."
"It's a huge opportunity, we're looking to express ourselves and continue to play as we have in the last four years.
"The other one is to inspire the next generation of cricketers to come into the game and pick up a ball and a bat, hopefully come out of the tournament worshipping one of the guys in our team."
England wrapped a 4-0 home ODI series win against Pakistan ahead of the World Cup.
"We'd like to start playing tomorrow," said Morgan.
"We've had some really good preparation against Pakistan, I don't think could have gone better, chopping and changing. Everyone just wants to get on with the tournament."
Explaining David Willey's omission, Morgan said: "It's simply because over the course of the tournament we need to cover all possible cases with the squad and the fact we have three frontline bowlers (Archer, Chris Woakes and Liam Plunkett) who all take the new ball affected that decision."
Back-up spinner Joe Denly also missed out, with Morgan saying: "I spoke to Dave and Joe last night and obviously said longer term, with the length of the tournament we are likely to get injuries - they are next in line, no doubt about that."
As for Archer, Morgan said: "Jofra has come in and done exactly what he's been doing for Sussex and other franchise teams around the world.
"I think he's come on in the games he's played. If he continues to improve throughout his career, he's a very exciting prospect."