Alonso will race in Formula E over IndyCar (Update)

So what is the 2nd championship Alonso mentions below if it is not IndyCar and Formula E?

This rumor is downgraded to 'false' today. Fernando Alonso has denied that he will drive in Formula E.

However, Alonso acknowledged his familiarity with the series but has said that he's not interested in taking part next season.

Alonso announced earlier this season that he'd be retiring from the sport at the end of the campaign.

Speaking to AS, he was asked about the Formula E program: "All motorsport categories are interesting to me. I watch them on television, I like what I see because I am passionate about motorsport, but I do not see (Formula E) as part of my plans right now."

Formula E boss Alejandro Agag has already revealed that he'd be excited to have a name of Alonso's pedigree involved in his sport and the Spaniard has confirmed the contact between the pair.

"I have spoken with him, but it has always been clear I would not be racing there next year," Alonso added.

Alonso has reiterated his uncertainty for the near future, saying there are "two things in the air".

"Right now, there are two things in the air, but nothing has changed since two weeks ago," Alonso said. "There are two championships that I'm interested in and I need to see how I can combine them."

10/24/18 Formula E has set its sights on adding Fernando Alonso to the series and according to Italian newspaper reports, is prepared to pay him $10M per year.

Two-time world champion Alonso will leave Formula One at the end of the current season and has now rejected a move to IndyCar

Alonso will also continue the rest of the World Endurance Championship super-season, which will culminate with the 2019 Le Mans 24 Hours — an event he won with Toyota teammates Sebastien Buemi and Kazuki Nakajima earlier this year. With Alonso's immediate schedule after F1 looking busy, Formula E chief Alejandro Agag thinks it is more realistic the Spaniard would be available for the all-electric championship's 2019/20 campaign.

"I've been speaking with Fernando," Agag told the South China Morning Post. "Actually, I was with him in Monza, I think he's going to America this season, but definitely for the season after we are going after him.

"I speak with Fernando a lot, he likes Formula E a lot. He's very car-focused, Fernando. He's very curious about the new car that we are starting in Season Five. He wants to know more about that car and he think it looks very cool. Fernando is all about the car."