In general, I find “survival seeds” tend to have lettuce, cabbage some corn, green beans and one type of tomato.
I’d like to see more beans and peas. Perhaps black eye peas, bush beans, etc. Also some green onions, scallons, etc. More tomato choices would be nice (roma and cherry).
Also looking for some grains (flax, oats, wheat, rice, etc)
The gardening thread has many great links for websites that offer open pollinated or heirlooms. You are going to do better if you buy your seeds in individual portions, rather than relying on one of the SHTF packages. You will be way overcharged.
You can plant seeds from hybrid varieties, but you are going to get one of the parents as a result, not another hybrid. There would be absolutely nothing wrong with planting and consuming foods from hybrid variety seeds. I've done it many times. Saving seeds from opens and heirlooms is better.