I don't trust Pena long term. Would take De Gea over him anyway of the week.If MATS is out for the season would be very surprised if Barca doesn't get an experienced/veteran keeper on loan in January. But if it's estimated 2 months then maybe not. But if its 2-3 months and there's any delays...well....
David de gea anyone
This is one of the reasons I am pessimistic about his renewal.
Last few years he's had knee and back issues, leading to multiple games missed. He'll turn 32 soon and no most GKs don't play well until their late 30s, there are some exceptions, but most don't do it. It's usually GKs on the more taller side as well.
It's not the highest priority right now of course, but the club need to be aware and keep an eye on upcoming GKs because they might need to replace him sooner than most think.