It looked as though the Spanish stopper was going to trade Old Trafford for the Bernabeu in August before the deal dramatically collapsed at the final hurdle.
Since then, De Gea has signed a new contract with the Red Devils while Keylor Navas has established himself as a firm fans' favourite at Los Blancos.
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However, according to the Sun, who cite Spanish publication Marca, the former Atletico Madrid stopper is a top priority for the 10-time European Cup champions.
The report claims Real will go back in for the 24-year-old next summer and will not be put off by the new and improved deal he signed in September.
Despite putting pen to paper on a new contract, it always seemed likely De Gea would end up in the famous white strip.
With the possibility of United losing their prized asset on a free transfer at the end of the season, the new deal was a way of the Red Devils covering their own backs.
It has not been confirmed, but there is speculation a £30 million release clause was included in the new deal.
If that is true then it is plausible that the Spaniard will be returning to his homeland in the not too distant future.
If De Gea was to leave, United could potentially bring Navas in the other direction.
The Sun states Madrid are preparing a new deal for the Costa Rican. But having established himself as the number one at the Bernabeu, it seems unlikely he would be happy playing second fiddle again.
Do you think David de Gea will move to Real Madrid at the end of the season? Have your say in the comments section below!