The Spaniard, while appearing in the post-match press conference, discussed the prospect as Real Madrid head-coach Zinedine Zidane ruled out the possibility after Barcelona refused the gesture back in December after the Whites clinched the Club World Cup trophy.
Barca have regained La Liga, the 25th league championship success in their history, and they have done so without losing a match.
Lionel Messi bagged a hat-trick - as he would do almost eight months later against Deportivo de La Coruna to seal the title - and it was clear Barca meant business. For us he's everything, the brand of this era, and he won the World Cup with the national team. Is it the English-speaking media's Premier League bias?
The 31-year-old showed off his ball skills during the second-half by juggling the ball just outside the Deportivo box as many times as Barca have won the league in the last 10 years.
After winning his ninth league title, he said: "The team deserved it with a good advantage over the second (team)".
"We were superior to all our rivals and we haven't lost a single game".
Could a charging Valencia side underline their title credentials with a victory against mighty Barcelona at The Mestalla?
Lea Michele Is Engaged to Zandy Reich -- See Her Gorgeous Ring!
In the photo below, a clearly effusive Michele poses beside seaside with her ring-bearing hand covering her smiling face. In November 2017, she spoke to People about her relationship, saying: "I'm very happy and I think that you can tell".
I'm delighted because this has been a very long competition that we have been chasing since the moment we went to the top of the table. Valverde deserves this more than anyone.
"I'm very happy", he said.
Barcelona coach Ernesto Valverde praised the consistency of his title-winning side while acknowledging they have "lacked brilliance" at times.
"It's been an nearly ideal season for us in the league", midfielder Sergio Busquets said. "Roma was a hard moment, but it should not erase what we have achieved in the last week".
The Spanish global added, "Everyone would have taken it, although we know that in the Champions League we were knocked out badly".
Barca have a rotten record in San Sebastian and it looked like they would finally taste defeat when Willian Jose and Juanmi put Real Sociedad 2-0 up inside 34 minutes.
Hopes were high inside the Riazor, but Messi not to be outdone - struck twice in the final ten minutes to seal the win and the title for the Catalan side.