"It's going to be a challenge for everybody but we'll take it in our stride, compete and we'll surprise a few people", March told The Times newspaper.
"Danilo is 26, (Benjamin) Mendy is 23, Bernardo (Silva) is 22, Ederson is 23, so we bought players who are going to be stable for the next years". The three-man back line was also in fine form of late, conceding just one goal in last three matches, so the Citizens definitely look a good bet to defeat Brighton in their opening game.
Guardiola actually enquired about Busquets last summer but a move never materialised, and it will surely be a hard task again this summer after Barca lost Neymar to Paris Saint-Germain in a world record transfer.
"We had one of the oldest teams in the Premier League so we made a decision to put energy in the team for the next five, six years", he said.
"I think it is unsustainable".
There is the slightest possibility that defensive midfielder Busquets, 29, could be tempted by a reunion with current City manager Pep Guardiola, who had a huge impact in his early career as Barcelona boss between 2008 and 2012. Our fans really get behind us and they're going to step it up even more because they know we need them even more.
They return to the fray this weekend having spent around £200 million ($261 million, 221.3 million euros) on players and Guardiola believes an exciting new team is taking shape.
"That is why the club was clever to do that because we anticipated what we needed and we tried to do our best, not just for next season but the future".
Chris Hughton insists Brighton can hold their own in the Premier League by targeting "middle market" signings while the big clubs flex their financial muscle.
And they have also let six of last season's title-winning squad leave, including John Terry and Nemanja Matic, with Diego Costa seemingly soon to join them. "We are here to win the games and titles. We did it without pressure in friendlies and now we have to see how we react under pressure".