Looking good!. You’re really getting somewhere. Woohoo! The lizards are coming, you scared me for a second before I read what you hade written. Seriously though I think lizards is a great way to express some sort of culture as they will be domesticated animals.
I don’t like the big planet in the sky, unless it is the reason for the migration. To me it looks to close and takes to much attention. Maby make it smaller. Or remove it all together. I think that the lizards, the alien rock formations and the people explain fully that we are on a different planet than Earth. It makes the planet in the sky a bit reduntant. Maby some alien desert plants on the far right in exchange.
I like the new compostition. Opens up for more emotion, and the line of people creates a great depth in the image. I like the colour of the sky. I think it adds to the sadness, and also purple is a common religious colour, which I think really brings out the grandness of the theme.
Keep it up!