I say we get leviathans added to multiplayer, but lets do this:
Another idea would be to allow broodlords to attack air and ground and make them a bit faster and don’t require them to be morphed from corruptors.
Dontchuno zerg isn’t allowed to have as many units as the other races, even though they are known as the adaptive race.
I mean just look what Kerrigan did in HotS, instead of reserving a few specimens of alternative evolutions she decided to extinguish any she didn’t deem optimal, even though what’s optimal is dependent on external factors.
I wanna see a leviathan in real SC2 games 
Keep hoping, we’ll never get it! SkyZerg is so limited, we have Mutas that can only harass and Corruptors that are only a “counter” to what the opponent does. Broodlords are basically extinct in all matchups. I think the corruptors are the most pathetic and sad unit in the game, just compare it to Carriers, it’s supposed to counter them, but it costs more (3 corruptor to kill 1 carrier), you need 21 of them to one-shot a Carrier, if you have less you’re dead cause it’s like having half of them, you need to micro them, they need to be on pair in upgrades and they aren’t even enough on their own, but you have to combine them with Vipers and if you’re lucky enogh to win you now have a huge ammount of supply that can do absolutly nothing for the rest of the game.
It would be decent if we could morph Broodlords back into Corruptors, that would actualy make them intersting and usable, but I don’t think it will ever happen, Zerg is in complete disgrace and it will stay that way.
I have a few ideas:
Imo air units in general in SC2 need a massive nerf across the board to make the game more ground based they’ve been given too much priority.
Capitol ships are seriously boring. I like harassing air units like phoenix, muta and liberators but late game with mass carrier/BC is crap.
Make it an upgrade for the broodlord.
I’m assuming this is a genuine discussion, hopefully, and not just spam about imbalance, etc.
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Firstly, I think it is more important to understand why Z needs such a unit.
There is nothing in the current meta that cannot be countered by what Z already has. So it defeats the purpose of the Z having something like that. On a side note:
What you are suggesting is something that already exists in the game as 2 separate units. So there isn’t really a reason why there will be a need to have something as such.
Of course, the common retort would be:
But T and P have BCs and Carriers, Z is the only one that doesn’t have a similar unit.
Which leads me to my next point.
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I have addressed this at length over here under Topic #3 that:
I cannot emphasis this enough. None of the races are intended to be a mirror to another race (but in a different form). That is what Command & Conquer does, but Starcraft is NOT C&C. It is intended to be as such because if the races each have a counterpart, then it defeats the purpose of having 3 distinct races in the first place.
The more probably reason that I think you are considering such a suggestion is because you want something that the Z can mass (similar to T / P) that is a hard counter to everything. Unfortunately, that is not how Z should be played. If you are uncomfortable with the play style, I’d actually suggest that you consider switching race. It isn’t really practical to change the race itself (since everyone has different opinions on how the race should behave / be played; you can easily just look at the state of the forums to have a clearer picture).
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Lastly, there aren’t any plans to have new content:
Though they did not specifically make mention about it, considering Activision’s track record of monetising new stuff, and their claims of “we’re not going to be producing additional for-purchase content, such as Commanders and War Chests”, it is easy to put 1 and 1 together to mean that it is an equivalent of no new stuff in the future.
So matter how good the idea is (I do think it may lead to a significant variation in meta), what we have is what we get at the moment.
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When you combine the above, every point seems to be against such a suggestion. So it begets the question of, “To what purpose,” and whether this purpose is in line with what the developers want.
Just my personal thoughts on this matter.