Here's the trailer

Has this been in development for... 1 year or something like that?

Also, LOL at them being in the distant past but using Pokeballs.

felling sceptical about this announcement. This seems too prematured based on what we saw in the last trailer.
A new trailer will surely come in few weeks. I just hope we don't end up having an empty game with powerpoint animations.

Even though its looking a bit half baked at the moment, this is easily the excited I've been for a Pokemon game post reveal. The potential is all there, even if falls technically short. Iron out that exploration/discovery gameplay loop and thats me sold

I hope I'm wrong, but this really needs more time in the oven, if what we saw last is anything to go by. GameFreak has struggled a lot in the technical department (corner cutting aside), and this seems more experimental than the usual Pokemon title.

Judging by this photo it looks far more polished now.

Any still picture can look good enough. I want to see the game in motion, Game Freak's Pokemon games have had troubles with their performance since they went 3D.

1) Wasn't it reported that the first trailer, when it came out at the reveal, was made quite a while before the reveal, indicating even at that point the game was further along than the trailer showed?

2) Nintendo-made games, historically, have produced a literal butt-ton of polish in short time.

3) This could be th kind of game, like ACNHor, Splatoon, Sea of Thieves, or No Man's Sky, that is more empty at first and adds lots of content over time to fill it out.

They announced it in February, but that doesn't mean it only started development last year. I don't think they've given us a timeframe for when they started development. Game Freak always works on multiple projects at a time. 

As for your Pokeball comment, you can see in the trailer how they aren't traditional Pokeballs. They're made of wood and have metal clasps instead of the traditional button like Pokeball we see from modern games. 

1) The trailers for Sword and Shield released months before the launch of the game too, and when it launched, it had very little changes from those, even with things that people complained about before release. Textures were unchanged, NPC movements were unchanged, big spaces were too empty...

2) That's right, Nintendo-made games get a lot of polish in their last months. But this is Game Freak we're talking about here, not Nintendo. And ever since they went 3D, the performance of their games has gone down quite rapidly. Just look at the dip in quality SwSh can get in certain parts (like the wild areas, or the very short draw distances), and that was with all of the corner cutting supposedly done to improve performance.

3) That's not a point in favour of the game. If the game's going to need months to get enough content to justify its purchase, why bother launching it so soon? This is not acceptable behaviour, just finish the game before releasing it.

I would say that, after the disaster that was Sword and Shield (from failure to communicate, to new levels of corner cutting and recycling, to simplifying the story and gameplay once again, to charging extra for less content...) it would be wise to be skeptical of Game Freak. I don't know whose fault is it, if it's Masuda being unambitious or The Pokemon Co. putting a lot of pressure from behind the scenes, but the quality of their releases has reached a breaking point for me. And unless we see some drasting improvement, I'm not going to support them. Don't preorder, wait for reviews.

Though in the end, it's not going to matter much. People complained a lot with Dexit, and after all the boycott threats, SwSh ended up becoming the fastest selling pokemon game ever. I don't believe the fanbase can put their money where their mouth is.