E3 2016: 10 Major Legend Of Zelda Rumours You Must Know
4. Varied Boss Battles After Time Jumps

To go more in-depth on what these hypothetical time jumps would change, look no further than boss battles that actually change depending on whether Link's in the past or present. For example, if Link makes a jump into the future, he may discover a stronger, battle-tested boss at the end of the dungeon. If he goes into the past, and finds the same being, he may discover a younger, more aggressive foe.
Now, obviously this wouldn't be the case with every boss. The story likely wouldn't be flexible enough for each major boss to be varied substantially, and a number of them likely will only be accessible in certain parts of the timeline. Regardless, this would add an extra non-story element to the time travel mechanics, allowing the game extra variance to motivate multiple playthroughs.
Likeliness of being true: 3/10.
Once again, this depends on time travel to even be present within the game itself, which is no guarantee. It also may prove to be too much of a challenge to provide proper usage of bosses that literally change over time. It's a mechanic that may prove to be too ambitious for developers that may, ultimately, deem it unnecessary.