What is the ruling on registering a plot of land in the wife's name, and distributing the inheritance if the husband dies before her, or she dies before him, or they die in succession? And is this registration considered an injustice to the husband?

A person is permitted to dispose of their property through a gift (hibah), provided they have reached puberty, are free, and are of sound mind and discretion. If you registered the land in your wife's name with the intention of transferring ownership, and your wife took possession of the land, then the gift is valid, and the wife owns it. In this case, if you predecease her, the land will not be part of your inheritance but will belong exclusively to your wife. If your wife predeceases you and the land was her property, then it will be part of her inheritance and will be distributed among her heirs. However, if your wife did not take possession of the land, the gift is not valid, and the land remains your property, becoming part of your inheritance and distributed among all your heirs. You are most aware of the benefit, or lack thereof, in registering the land in your wife's name, and it is not obligatory for you to do so.