The 2.08m power forward, selected to the NBA All-Defensive Second Team, ranked third in the league with an average of 2.4 blocks last season.
However, it’s not known if Ibaka’s paperwork to become a naturalised Spaniard will be approved in time for him to represent the country at the EuroBasket.
“We still don’t know if Ibaka will be able to be with us,” Spain coach Sergio Scariolo said.
“The FEB (Spanish Basketball Federation) has followed all of the necessary procedures and we are moderately optimistic.
“But we will have to wait and see.”
Another big development that had been confirmed weeks ago is Pau Gasol’s return to the squad.
Navarro’s 171 appearances with the national team are the most among those included.
Rubio, who has decided to launch his NBA career next season with the Minnesota Timberwolves, has played for Spain the last three summers.
Gasol’s younger brother, Marc Gasol, is again in the group after helping the Memphis Grizzlies reach the playoffs and upset the top-seeded San Antonio Spurs in the first round.
Madrid came in second in the ACB and reached the Euroleague Final Four while Valencia were third and enjoyed a surprising run to the Euroleague quarter-finals.