No, no plans to add "content".
None whatsoever.
That's why we don't get major patches every few months.
(does M&B have 100 billion locations & trillions of literally planet-sized places to explore? Must check it out.

)
Sorry Juniper - normally you're ok (ish) with your replies, but had you not noticed that of the billions of planets blah blah there are not that many variations - will going to the other side of the galaxy to see that same "generic lava planet v5" make that exploration any better?
I'm sure someone or group of someones have been cataloging all the different planet classifications. If there was more than 30 base types I'd be amazed, because so far there isn't even that many in RL. If there was more than 100 including subgroups of size "big one / little one" I'd buy you dinner, someplace nice - even if you throw in "one polar icecap / TWO polar icecaps" - you won't even be able to smell 500 let alone hit it.
Out of 200 billion.
***
But please do prove me wrong - I like being educated.
And to repeat myself again - apart from going and looking - what else is there to do when you get there? Can you go mining or pick up any thing? Well yes you could, but you won't be able to get back because of the whole "ED uses a fuel system that for exploration means most of the time you are running on empty to save mass."
So collect anything and your jump distance reduces, coz "mass".
Yes yes ofc - "this is how it is in reality".
but isn't is so odd that when I introduce "reality" into an argument about why a mechanic of ED IS NOT LIKE REALITY - all I ever hear is "ED IS A GAME NOT REALITY" and "handwavium" is the better option, or the other favorites, "you can't use GalNet to pay fines remotely, or get trade information outside of a very small sector," even though galnet stretches across both bubbles.
There's a fact that players of ED like yourself that have the mindset of "ooooh 200 billion things to look at" always conveniently forget - It'll NEVER amount to anything, it can't, the task of making even 5% of the galaxy more interactable than "honk and jump" would take decades, and using the currently limited set of generic procgen variables won't be the answer because it'll fall into the same trap "it will still ALL LOOK THE SAME", and a different nametag won't ever make up for that.
It would need a procgen system with a signifcantly larger set of visibly different variables, and I'm talking HUNDREDS, not dozens, all interchangeable so you really might see something particularly odd on occasion somewhere far away (or next door) if they also fiddled with the spawn values to add another layer of factors into the procgen.
For all it's flaws NMS at least tried to do this, and yes although the animals occasionally look bloody odd, wasn't that the idea? People all pointed and laughed, and no-one noticed that NSM had had the balls to try to do something no-one else had. I think the bloody stupid looking animals ADDS not detracts from NMS, because now you're in "box of chocolates" territory.
*** Which, BTW you STILL can't do anything other than, "honk and jump" or if you've got a few spare millennia to waste, you could even land and have a drive about in your SRV - just don't get stuck like Bomba Luigi did (man that was so epic - I still think the guys who helped should be given a decal or something). in ED it is quite literally a waste of space.
PS - I've not played M&B but amount of playarea has NEVER BEEN the primary reason why a game is successful. A real gamer would know this. If you think I'm wrong, imagine ED with just twice the volume of play area - 2 whole galaxies worth of volume, but still just 2 bubble zones and outliers. Has the game suddenly become twice as playable? Let ask the viewers......
PPS I've just realised I've got M&B in my GoG library - lets go!