If husband dies and there is no will, except for a 26 year old will that predates our marriage and assets, is that will valid?

If the will is otherwise legal-signed at the end and witnessed, someone could file it. As a spouse, you would then file a document titled Election Against Will which would allow you to claim 1/3 of all property acquired during the marriage. However, the will only covers property in his name only. If, as you say, all of his property is jointly held or by the entirety held with you, then you will inherit all of that joint property. If that is the case, perhaps the will really is not an issue as there is nothing passing into his estate.