The followin classes can use a mythic two-handed weapon:
Even the new Spiritborn class gets its own mythic unique 2H weapon from the start.
For no reason the rogue still has no 2H mythic unique weapon (bow or crossbow).
Therefore I suggest to give the rogue a mythic bow or crossbow.
I agree. Also there are no mythic focus or totem in game. I think each hero should have at least 1 mythic for that hero or no hero should have hero specific mythic. Cant have heroes left out.
I will try one.
Quicksilver, Swift Justice
Mythic Bow / Dagger
150% Damage to Distant (inherent bow)
150% Damage to Close (inherent dagger)
30% attack speed and 15% more if no enemies are close - Bow
Add your DEX to your INT - Bow
40% Lucky hit - Bow
40% Movement speed and your evade is the sorcs teleport with 6s CD - Bow
18% Critical Strike Chance and 9% more attacking from behind - Dagger
Add 60% of your DEX to your STR - Dagger
25% Lucky hit - Dagger
25% Movement speed and your evade is barbarian charge skill with 8s CD - Dagger
Polymorphic - You can change this item to a bow or dagger by having it eat another unique bow or dagger. It always starts as a bow. You cant equip this item twice.
Infuse your attacks with a random core skill of a random class. Shadow and poison and physical skills are more likely.
Numbers might be off but you get idea
Yes and Druid should be allowed to dual weild, and with 2 2H’s call it the SuperSized option.
Let me count out 20 question marks to hit the minimum
???
This mythic can either be a bow or a dagger. You change it by sacrificing a bow or dagger unique to it. As a bow it has different stats than as a dagger. Thats it.
I get it, bro. Im just trying to physically envision it. I read a lot of fantasy novels and cant recall a bow-dagger
Its not both at same time. Its a weapon that can change form. Its quicksilver!
Weird Total Recall Baby: Open your mind!
Urza, i like you. But its … a cop out
A cop out of what? A weapon that can have 2 forms is too mind blowing for u?
Its sorta like having 2 mythics in 1 item. Its super cool. Just trust me and +1
That’s some imagination right there.
I’m still waiting for a fancy crossbow though.
Still Missing:
Mythic Boots
Mythic Legs
Secondary Mything Ring <---- Please be Stone of Jordan
Mythic Off-hand
Mythic Wand
Mythic 1 and 2H Axe
Mythic 1 and 2H Mace
And your mentioned dagger & bow (crossbow or longbow?)
Edit: Forgot totems (sorry druids)
We dont even have a single unique x-bow in the game. 
I made jokes about it taking till S3 to get one and look where we are.
The reason is that all the way untill late S4, blizz didn’t want the rogue to actually use a bow, they were hellbent on making them be a dagger and sword building character.
It’s kind of the whole reason I never played rogue. I don’t find that kind of playstyle fun, at least not on the rogue. I want bows.
Admittedly, S5 was a little better in that regard, but look at the new spell: throw daggers…
They are too fat to dual wield
Would be nice if rogue could have shuriken or blowgun attacks. Everyone liked the small bush-people (not the president) shooting at us in the jungle area in Diablo 2 
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Yes! A pretty bow for her hair and some 6 inch heels!
How about a bow shooting unicorns dancing on rainbows making wiiiiihihihihihihi sounds? (looking at you Dreamer Bow of GW2) 
They need to bring back the Horadric Hamburger as the new Druid mythic.
Very fitting indeed.
I fully support.
Somebody already mentioned it and THAT would be totally awesome: A bow shooting NYAN-CATS 
Would also be nice to get it as a cosmetic item. I would pay googolplex moneyz for it. Sadly i only have 3 knobs and 100g beechnuts left. Maybe i can trade?