However, the meaning can be more nuanced depending on the context. Here are a few possibilities:
* It will be the island (that...). This implies that the island will be something specific, like the place they go to, the object they find, etc.
* It will be like an island. This could be metaphorical, referring to something isolated or separated from the rest.
* It will be the island (in the future). This could be a prediction about a future state of being.
Without more context, it's difficult to give a precise translation. Can you provide more information about where you saw this phrase used?