Investment value depends on how many get into circulation. But having Dhani Harrison and Fender name on the same product may be a good start.
It is not in the same market space as solid koa, made in Hawaii ukes, or similar models.
I have not seen one in real life, the shops here are showing that it is sold out already. But looking at the advertising material and videos, it looks like a model which would suit ukulele players that like to play loud into amps in public spaces. Like a workhorse for a person who makes a living playing. If that turns out to be the case in reality, I compare them with a guitar model, the mini-Maton in Australia, which is very much in demand and is hard to get a used one, the factory output has been constrained by lockdowns, and they are selling for not much below original purchase price. We need to wait and see before getting too excited.
If it turns out to have on-going popularity, IE the people who have bought them love them and wont let them go easily, they are popular with bands and performers, there could be strong demand for used items when the new stocks run out. So I am suggesting that if you get one and find it to be not for you, that you do not just do a dummy spit and turn it over straight away. I am suggesting that you wait until the new stocks run out and then look at the re-sale, there is a chance that you may not lose much of the purchase price if you are patient. I do not think it will be a long wait.
I am not sure about buying one just to be a collectible. I would suggest that you buy it because you want to play it loud in a public space, try it in a shop if you can, don't just buy it to put into a collection. If it turns into a collectible, some cool looking beausage from some serious playing may not do it any harm.
If you do not want to play it loud in a public space, maybe you should just stick to the cheaper favourites on Amazon you like so much and save your money.