What 70's sci fi movies should be remade?

If you're above a certain age, you remember the glut of cheaply made SF movies that popped up after Star Wars, but before Empire Strikes Back occurred. None of them had anything near the production value, they were just riding the wave of popularity. Nonetheless, I think there were some that could have been good, and would be good if remade today with even moderate investment, given the improvements in effects etc.
Here's a couple I remember vaguely, and would like to see redone with a better effort:

1) Message From Space. This was a Japanese movie and I think it had some anime styles in it. As I recall, it had a good bit of adventure to it, and with a solid budget would have been impressive.

2) Battle Beyond the Stars. This was a Roger Corman (thus cheap B- movie) that had some potential. Kind of a Magnificent Seven/Seven Samurai ripoff, in space. Actually had a solid cast for what it was, with Henry Thomas (John Boy from the Waltons) in lead, and with Robert Vaughn, George Peppard, John Saxon, and Sybil Danning in it. I think a similar approach, but with today's standards in filming, it could be very entertaining.

These are just a couple, that clearly pale when compared to Star Wars at the time, that I'd think could be done today and produce something good.