Barcelona take on Real Madrid in a pre-season Clasico friendly in Las Vegas on Saturday that promises to offer a glimpse into the future of the Spanish giants' iconic rivalry.
Ancelotti has hinted that he may use Real's three-game US tour as an opportunity to experiment with his forward line, citing the unusual mid-season disruption that will come this year due to the first ever World Cup being held in the middle of the European football calendar.
"Benzema is first choice but we have to understand that it will be a strange season, with the World Cup in between and we have to look at different options," Ancelotti said.
One of those options may involve deploying Eden Hazard as a false nine, Ancelotti said.
While many pre-season games often have the feel of glorified practice games, Ancelotti insisted that the mutual antipathy between Real and Barcelona ensured that Saturday's clash would have an edge.
"It will be a very, very competitive match. It is never an exhibition against Barcelona. It will be a spectacle," Ancelotti said.
Ancelotti's Barcelona counterpart, Xavi Hernandez, will also have the chance to run the rule over the club's summer signings.
Bayern Munich sharpshooter Lewandowski is the club's marquee acquistion, but Barcelona have also invested heavily to bring in Brazilian forward Raphina from Leeds as well as midfielder Franck Kessie from AC Milan and defender Andreas Christensen from Chelsea.
Lewandowski was unveiled by Barcelona on Wednesday but did not play in the previous night's 6-0 thrashing of Inter Miami.
The Polish star is desperate to get to work though with his new teammates and could be set for a Clasico debut on Saturday.
"I am always hungry to succeed and have the winning mentality," Lewandowski said this week. "This is a new challenge for me and I have already seen this is a squad with huge potential.
"There is a lot of quality and I want to do my best for the club. I am ready."